Interactive Grid Parity Map for Solar Energy - United States
Share this great resource
What is grid parity? Click to learn.
Grid parity, also called socket parity, is a measurement that compares the levelized cost of solar electricity with the cost of residential retail electricity. When grid parity is reached, it becomes more economical for you to install solar panels on your roof rather than purchasing power from your utility company. Read more here.
Click to read about our methodology.
Solar electricity estimates are determined using solar radiation values for state capitals. Solar generation figures are based on an average-sized residential solar PV system of 5 kW that is operational for 25 years. Default installation cost is estimated to be $3/watt (not including the 30% federal tax credit). This figure is based on an NREL study published in September 2017. Where available, state-based solar tax credits were also included in the levelized cost calculations (other incentives, such as performance payments or property tax exemptions, are not included).
Utility rates are based on the monthly residential rate data set as reported by the EIA. Utility rates are computed using the last 12 available months in the dataset.
Solar savings per kWh >5 ¢ 4 ¢ 3 ¢ 2 ¢ 1 ¢ 0 ¢ -1 ¢ -2 ¢ -3 ¢ -4 ¢ <-5 ¢Solar deficit per kWh